I made a frame to mount my tractor's crusher. Between frame and chopper, they weigh less than 800 pounds. A set of these 5 inch wheels is (supposedly) rated for 1500 lbs. On my concrete basement floor, one of the poles buckled when I tried to move it a second time. No, the brakes have been removed from all wheels. A good quality 1/2 inch bar will flex the way it does. I would never buy them again.